318661529 has 2 divisors, whose sum is σ = 318661530. Its totient is φ = 318661528.

The previous prime is 318661523. The next prime is 318661547. The reversal of 318661529 is 925166813.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306250000 + 12411529 = 17500^2 + 3523^2 .

It is an emirp because it is prime and its reverse (925166813) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 318661529 - 2⁴ = 318661513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (318661523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159330764 + 159330765.

It is an arithmetic number, because the mean of its divisors is an integer number (159330765).

Almost surely, 2^318661529 is an apocalyptic number.

It is an amenable number.

318661529 is a deficient number, since it is larger than the sum of its proper divisors (1).

318661529 is an equidigital number, since it uses as much as digits as its factorization.

318661529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 318661529 is about 17851.0932158229. The cubic root of 318661529 is about 683.0353987857.

The spelling of 318661529 in words is "three hundred eighteen million, six hundred sixty-one thousand, five hundred twenty-nine".